I discovered something today that finally let me play the game pretty smoothly, which was impossible task before due to being shuttery mess all over the place even on Vulkan API.

1. Run your game once to create default config.
2. Go to your Steam folder, then find the following path .\userdata\*Your_Steam_Id*\257420\local\SeriousSam4.ini
3. Open the game config file, find the following commands inside and change them as following

sim_fWorldPrecachingStreamingLoadingDoneThreshold = -1;
texs_ctMaxUnloadsPerFrame = -1;
texs_ctTooMuchLoadingTextures = -1;
texs_fTooMuchToLoadAtOnceMB = -1;
gfx_strAPI = "Vulkan";

Then save the file and start your game as normal.

Those settings made my game from barely holding on Medium with massive shutters to going on everything Ultra with playable smooth 70+ FPS on RX 580 8 GB.

https://i.ibb.co/1L9BSg5/Sam4-2022-01-14-19-38-04-472.jpg
https://i.ibb.co/SfBtSTv/Sam4-2022-01-14-19-38-25-702.jpg

- Additional Note -

Extra settings you can also try to improve performance is forcing in the game config the cpu threads you have, for example if you have 8 core 16 threads processor, force those commands as follows:

ren_iMaxRenderThreads = 16;
thr_iMaxWorkerThreads = 16;

Bumping this, this helps a lot. I had been using some of these already but not all of them. Pretty sure this also works for Siberian Mayhem! (Even though SM is slightly better optimized already)

Gonna give these settings a shot and see what happens.

Very nice! Thx - performance was massively improved!

this fix the performance. thank you very much.

I thought it was an Ampere issue. I played SS4 three times on my Pascal card, and it was fine.

Now have an Ampere card and it's a mess. When it hitches and stutters bad, even the audio ends up stuttering.

I carried on searching the threads, and found that changing from Vulkan to DX12 helped a lot.

I guess that's why my previous three games played better, because I would have used DX12. (Nothing to do with Pascal and Ampere.)

Amazing. This turned a game that was unplayable thanks to stuttering to a smooth experience. How did you find those settings?

Anybody know if this fix works or is even necessary for Siberian mayhem? I haven't bought it yet but am curious because I'd afraid of potential stuttering/performance issues in it.

Siberian mayhem is no different when it comes to texture streaming implementation, and since these settings are disabling it, you can expect similar results as in SS4.

Originally posted by redgrey:

Siberian mayhem is no different when it comes to texture streaming implementation, and since these settings are disabling it, you can expect similar results as in SS4.

Thanks! I don't have Siberian Mayhem yet, do you know if the folder (the one with the 6 numbers) will be different? It's a standalone game right?

Originally posted by COMES With Mashed Potatoes:

Thanks! I don't have Siberian Mayhem yet, do you know if the folder (the one with the 6 numbers) will be different? It's a standalone game right?

Yes it has the different folder number, 1792250 to be precise.

If you haven't enabled Resizable BAR, or AMD Smart Access Memory, you really ought to at this point, It makes a very noticeable difference in demanding games and software. My .02

this has fixed the stutters and fps drops and it now runs at 144fps on ultra settings, I was going crazy trying to stop the stuttering, i even set everything to lowest and it still did it lol.

Thanks for this

Sweet! I'm so glad it helped. I wish this feature was enabled by default. It is a huge game changer for so many things. There are applications which make use of this feature as well.

Can you share ur perfomance settings like v-sync, msaa? also do you disable fullscreen optimization?